Gilmartin B, Bullimore M A
Department of Vision Sciences, Aston University, Birmingham, United Kingdom.
Optom Vis Sci. 1991 Jan;68(1):22-6. doi: 10.1097/00006324-199101000-00004.
The study complements and extends our previous investigation and reports that late-onset myopes (LOM's, N = 15) exhibit differences in adaptation of tonic accommodation (TA) to sustained visual tasks when compared to emmetropes (EMM's, N = 15). Pre- and post-task TA was measured with a modified Canon R-1 objective infra-red optometer under darkroom conditions. Post-task TA was measured immediately after a 10-min counting task and at 1-s intervals over a period of 90 s; the task was located at distances equivalent to 1, 3, and 5 D. The pattern of regression back to the pre-task TA level was used to assess the degree of adaptation generated by the task. The data indicate substantial differences between regression patterns for EMM's and for LOM's which were enhanced as accommodation stimulus levels increased. Using a two-factor split-plot analysis of variance, statistically significant differences between EMM's and LOM's could be attributed to the rates of change of post-task accommodative levels to pre-task TA levels for both the 3 and 5 D tasks.
该研究补充并扩展了我们之前的调查，报告称与正视眼者（EMM's，N = 15）相比，迟发性近视者（LOM's，N = 15）在将紧张性调节（TA）适应持续视觉任务方面存在差异。在暗室条件下，使用改良的佳能R-1客观红外验光仪测量任务前后的TA。在一项10分钟的计数任务后立即测量任务后的TA，并在90秒内以1秒的间隔进行测量；该任务位于相当于1、3和5 D的距离处。回归到任务前TA水平的模式用于评估任务产生的适应程度。数据表明，EMM's和LOM's的回归模式存在显著差异，随着调节刺激水平的增加，这种差异会增强。使用双因素裂区方差分析，EMM's和LOM's之间的统计学显著差异可归因于3 D和5 D任务中任务后调节水平相对于任务前TA水平的变化率。
